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Table 2 shows the cul-rent constituents included in the ground-water monitoring program. <br />Table 2 -Ground Water Sampling Parameter List <br />Aluminum, dissolved Silica, dissolved Hardness as CaCO3 <br />Antimon ,dissolved Silver, dissolved Nitrate as N, dissolved <br />Arsenic, dissolved Sodium, dissolved Nitrate/Nitrite as N, dissolved <br />Barium, dissolved Strontium, dissolved Nitrite as N, dissolved <br />Be Ilium, dissolved Thallium, dissolved I H lab <br />Boron, dissolved Uranium, dissolved Phos horns, dissolved <br /> <br />Cadmium, dissolved i <br />Vanadium, dissolved <br />Phosphorus, ortho dissolved <br />Calcium, dissolved Zinc, dissolved Residue, Filterable (TDS) <br /> 1800 <br />Chromium, dissolved Alkalinity as CaCO3 Sodium Absorption Ratio in <br /> Water <br />_ <br />Cobalt, dissolved _ <br />Bicarb as CaCO3 Sulfate <br />Co er, dissolved _ Carbonate as CaCO3 Sulfide as S <br />Iron, dissolved H droxide as CaCO3 TDS calculated <br />Lead, dissolved Total Alkalinit TDS ratio <br />Lithium, dissolved Bromide Temperature field <br />Magnesium, dissolved Carbon, dissolved organic Gross Alpha Result (pCi/L) <br />Man anese, dissolved Cation-Anion Balance %o _ Gross Alpha Error (pCi/L) <br />Mercury, dissolved Sum of Anions Alpha Minimum Detectable <br /> Activit rte( Ci/L <br />Molybdenum, dissolved Sum of Cations Gross Beta Result Ci/L <br />Nickel, dissolved Chloride Gross Beta Error (~Ci/L <br />Potassium, dissolved Fluoride ~ Beta Minimum Detectable <br /> Activity (pCi/L) <br />Selenn.ini. dissolved Conductivity .1 250 <br />Table 3 summarises the wells, constituents, and frequency of sampling proposed for the period <br />during temporary suspension of production operations. Operations at the Yankee Gulch Project may be <br />temporarily suspended. Proposed revisions to the monitoring plan address both periods of temporary <br />cessation and norn~al operating CUlldlilOllS. DUI"ing the 1eI11pOCar)' suspension time period, water levels <br />and water quality sampling would be completed once per guar-ter for each sampling location at Yankee <br />Gulch and once per year for the domestic well located off site from Yankee Gulch. These level <br />measurements would be made in conjunction with the water quality sample collection. No production <br />SOlUtIOn 111111eS would be in operation and no brine solution would be circulating in the wells or the <br />pipelines. All stand-by status production wells that arc not plugged and abandoned would be at ambient <br />temperature and pressure with cast-iron bridge plugs or cement basket plugs set. The constituent list <br />would include the seventeen laboratory parameters and four Geld measurements specified in the bottom <br />portion of Table 3 and Table 4. <br />FINAL Addendum to SOB For Modification No. 9, LI IC Area Permit No. 0030858-00000 Png~~ 18 of 29 <br />